INFAMOUS serial killer Dennis Nilsen has written a secret autobiography that will be published after his death in which it is rumoured he will reveal he murdered more victims.
The murderer has written the book behind bars and and hidden it so that it cannot be accessed until after he dies.
Nilsen, 70, was caged for life in 1983 for killing and dismembering at least 12 men over the previous five years in London.
But according to the Daily Star he has hinted more victims have never been traced.
His book is likely to reveal for the first time the full extent of his evil.
Nilsen lured his victims back to two properties and either drowned or strangling them before bathing and dressing their bodies which he later had sex with.
He would then dismember his victims – rent boys, students and the homeless who had been promised food or shelter – before burning their bodies on a bonfire, boiling them or flushing their remains down the toilet.
The monster was caught when experts found human remains clogging up the drains of a property where the killer had been staying.
On his journey to the police station an officer asked Nilsen if the remains found in his flat belonged to one person or two.
He stared out of the window and replied: “15 or 16 since 1978.”
Now, in a letter from maximum security Full Sutton Prison in York, Nilsen has revealed he has composed thousands of typewritten pages of autobiography confessing all.
The former civil servant said: “I have told my own story in an archive of huge input to the extent of thousands of typewritten pages of autobiography and supporting material which will come to light in the future, possibly after I am dead and gone.
“This Nilsen Archive is in safe storage outside of prison.”